code: def test_batch_chroma_scale(self):
      n_freqs = 201
      specgram = torch.randn(3, 2, n_freqs, 256)
  
      atol = 1e-6 if os.name == "nt" else 1e-8
      transform = T.ChromaScale(16000, n_freqs, n_chroma=12)
  
      self.assert_batch_consistency(transform, specgram, atol=atol)
  
file_path: audio/test/torchaudio_unittest/prototype/transforms/batch_consistency_test.py
imports: import os
  import torch
  import torchaudio.prototype.transforms
  from torchaudio_unittest.common_utils import TorchaudioTestCase
label_desc: Use image node_id 4 for calling the BatchConsistencyTest obj's underlying member method code with example usage: obj.test_batch_chroma_scale() without return types